Cutter-bar for planing-machines.



W. G. BUNDSGHUH. CUTTER BAR FOR PLANING MACHINES.

APPLICATIOKQILED MAY 4, 1908.

Patented Apr. 20, 1909.

INVENTOR- mama? same srariis .PA"EENT enrich.

WILLIAM C. BUNDSOHUI'I, OF IRVINGTON, NEW JERSEY, ASSIGNOR TO HERMANJE'LINGK, OF

' IRVINGTON, NEW JERSEY.

CUTTER-BAR FOR PLANING-MACHINES.

Specification of Letters Patent.

Patented April 20, 1909.

Application filed May 4, 1908. Serial No. 430,635.

T 0 all whom it may concern:

Be it known that I, WILLIAM C. BUND- soHUn, a citizen of the UnitedStates, residing at Irvington, in the county of Essex and State of NewJersey, have invented certain new and useful Improvements in Cutter-Bars for Planing-Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to figuresof reference marked thereon, which form a part of this specification.

This invention relates to an improved cutter-block for planers or joiners, and consists in a block with knife or planing edges on itsblades, which cutting edges project slightly beyond a substantiallycircular periphery, this periphery being the result of placingcheek-pieces on an old-style cutterblock. The cheek-pieces on twoopposite sides are used to secure the blades of the cutter-block, andthe cheek-pieces on the remaining two sides are made with chipgroovesadjacent to the cutting edges of the blades.

The cutter-block previously used is of course not the novel feature ofthis invention, but the cheek-pieces and the means for clamping andadjusting the blades are new.

The invention is illustrated in the accompanying drawing, in which-Figure 1 is a side view of my improved cutter broken away to show thecutter-block. Fig. 2 is an end view of the cutter with one blade and onecheek-piece shown in section. Fig. 3 is an end view of the cuttenblock,and Fig. 4 is a view of a tool used for fastening and adjusting theblades.

I employ a cutter-block l0-which, as heretofore made, has the curvedraisededges 11 adjacent to the blades 12 and forming chipgrooves. Thecutter-block is suitably secured to a shaft 13 and planes the under sideof a board passing the opening 15 in the table 14, as will be evident. Iremove the raised edges 11 from an old cutter-block or make a new blockwithout them, and I insert in each of the bolt grooves 16 a squareheaded bolt 17 which projects from the block and into a cheek-piece. Oneach of the opposite sides of the block 10 I secure a cheek-piece 18 cutaway its entire length and part of its width, to receive a blade19having the cutting edge projecting slightly beyond the edge of thecheek-piece which has its outer edge concentric to the shaft 18, of thecutter-block, and with the inner edge of the opening 15. The blade 19 isthus clamped in place when the nut 20 is screwed down in the recess 21.The nut 20 has perforations 22 for receiving a spanner wrench 23, theother end 24 of the wrench being utilized to fit in the slots 25,arranged in each cheek-piece 18, to act on the back edge of either ofthe blades 19 to adjust them prior to their being fastened. The othercheek-pieces 26 fit in the faces of the block 10 between the slots 25and the blades 19, and also have their outer surface concentric to theshaft 13 of the block 10. Each cheek-piece has a chip-groove 27 on itsedge adjacent to a blade 19.

The advantages of this cutter device are many, since the chance of theoperator getting fingers in the opening 15 and having them cut off isnot present, since the opening 15 is nearly closed and the entry of anele ment is limited. In the old way the opening 15 is open and thechances of accident are correspondingly greater. The shock on planksetc., being fed to the machine, is slight compared to the first contactof the blades 12 in an old-style of machine. The concentric periphery ofthe improved cutter prevents material on the opening 15 from sagging andpresenting an excess of material to the knives or blades.

Having thus described my invention, what I claim is A cutter comprisinga cutter-block rectangular in cross-section and having longitudinallyarranged bolt grooves in its faces, cheek-pieces with outside surfacesconccn trio to the center of the block secured to the sides of theblock, bolts having heads in the grooves, perforated nuts set inrecesses in the cheek-pieces to provide a substantially flush surfaceand adapted to screw on the bolts to secure the cheek-pieces to thecutter-block, blades secured between oppositely arranged cheek-piecesand the cutter-block, the cheekpieces securing the blades having aseries of separated unobstructed grooves arrangedv alternately with thenuts in the grooves ex tending from the blades to the back edge of lhave hereunto set my hand this 2nd day of the cheek-pieces, the groovesbeing devoid of May, 1908.

permanent edjustin means and adapted to v 1 receive a handle of thespanner for adjusting HJLIAM BUNDSOHUH' 5 the nuts for the purpose ofadjusting the l Vitnesses:

blades. W M. H. OAMFIELD,

In testimony that I claim the foregoing, I HERMAN JELINOK.

